CZ2013744A3 - Driving unit with controllable intake stroke - Google Patents

Abstract

The suction drive unit (1) is equipped with a suction filter (5) of the internal combustion engine (3). The suction filter (5) is connected to a two-way divider (6) having a main inlet (12) and a protected inlet (13), depending on the operating conditions, the intake filter (5) of the internal combustion engine (3) is connected to either the main inlet (12), or with a protected input (13). This prevents dirt, water droplets, etc. from entering the suction filter (5) of the internal combustion engine (3). The two-way divider (6) provided with the slide (7) is further connected to the actuating member (8).

Description

Drive unit with adjustable suction

Field of technology

The invention relates to a drive unit of a motor vehicle, in particular a drive unit with an adjustable intake manifold.

Current state of the art

Currently, motor vehicles, with exceptions, are powered by piston combustion engines, which use a mixture of liquid fuel and air as a propellant, while the air is taken from the surrounding environment. The state of the surrounding environment is different, characterized by very different air temperature, dust content, the occurrence of snowflakes, and especially the content of water droplets. Water droplets of various sizes are contained in the surrounding air during rain or even outside of rain in the case of driving on a waterlogged road, for example just after rain. When driving on a flooded road, water droplets are created in the air so that the water film from the road is collected on the rotating tread of the tires and thrown into the air by centrifugal force. During this process, the water washes away the road, washes away dirt from it, which can also be grains of silica sand, and blows from around the road.

Since the performance of internal combustion engines is affected by the temperature of the intake air, where a lower temperature usually leads to higher performance and lower thermal load on the engine, current cars are equipped with intake air intakes in the front of the body to capture the cold blast air in front of the vehicle. Because the front part of the body, marked by the mask and front bumper, is low for aerodynamic reasons, the air intake is low above the road, i.e. in an area with a high content of impure water debris. As a result, this leads to the fact that in the aforementioned case, i.e. when driving on a wet road, a considerable amount of water droplets containing other dangerous impurities enters the intake pipe.

The design of modern cars is therefore characterized by the application of separators for water droplets and other impurities at the entrance to the intake tract, where the use of various physical principles, for example the use of centrifugal force, is an attempt to achieve the separation of water droplets and other impurities. Despite the good effectiveness of these measures, however, a significant amount of water droplets in particular still penetrate further into the intake manifold, where, due to the engine's suction, they move until they are caught in the filter insert in the intake filter. These filter inserts are generally made of high-density pulp in order to capture microscopic solid impurities in the intake air, so the filter insert contains a significant amount of the mentioned impurities on its inlet surface after a longer period of normal operation. If the inlet surface of the insert is subsequently hit by water drops, as mentioned above, it will initially capture the water drops with its absorbent effect, but if the supply of drops is massive, for example during a long drive in the rain, the filter insert will be saturated locally and the additional water supplied will pass through the insert towards the engine intake. During this penetration, water can wash out the filter insert and thereby introduce silicon microparticles into the fine mechanics of the engine with a devastating abrasive effect on important engine parts such as pistons, piston rings, cylinder liners, etc. The second undesirable effect of water entering the engine intake manifold is possible damage to the electronic sensors for measuring the amount of intake air. While the first type of damage, which is the abrasive effect of microparticles, has a gradual, devastating effect, damage to an electronic sensor is accompanied by an immediate failure of its function.

The essence of the invention

The aforementioned deficiencies are eliminated by a drive unit with adjustable suction arranged in the engine compartment having a protected space, consisting of an internal combustion engine with a control unit, which is equipped with a suction filter and a separator. The nature of the invention consists in the fact that a two-way divider with a slider is connected to the suction filter, which is connected to the control member.

The two-way divider has a main inlet that is connected to the separator, a protective inlet connected to the protected space and an outlet that is connected to the intake filter of the combustion engine, when under normal operating conditions the slide valve is in a position in which the main inlet is connected to the outlet and when in adverse operating conditions, the slide valve is in a position in which the protective input is connected to the output.

Setting the appropriate position of the slider is ensured by the fact that the control member is connected to the control unit, to which at least one sensor of operating conditions is connected.

The operating condition sensor can be a rain sensor, wiper switch, outside temperature sensor or engine temperature sensor.

The control element can be an electric, pneumatic or hydraulic servomotor.

Overview of images on the drawings

The invention will be explained in more detail on the example of the embodiment according to the attached drawing, in which Fig. 1 shows, in an exemplary embodiment, the schematic arrangement of a drive unit with an adjustable intake manifold.

An example of an embodiment of the invention

As can be seen from Fig. 1, a drive unit with adjustable intake 1 is arranged in the engine compartment 2, which consists of an internal combustion engine 3 with a control unit 4, which is equipped with an intake filter 5, to which a two-way divider 6 is attached via a pipe 16. The it contains a slide 7, which is connected to a control member 8, which can be an electric, pneumatic or hydraulic servomotor. One or more sensors of operating conditions 9 are connected to the control unit 4, which sense the operating conditions, which can be pollution of the outside air by water drops or snowflakes, the switched on wiper switch, the external temperature or the temperature of the combustion engine 3. The drive unit 1 also contains a separator 10 normal structure and protected space 11· This can be, for example, in the engine compartment 2 or in another place, with the fact that its choice is solved so that dirt, such as water drops, etc., does not enter the protected entrance 13. The two-way divider 6 has two entrances namely the main inlet 12, which is connected to the separator 10 by a pipe 15, and the protected inlet 13, which is connected to the protected space 11, and also the outlet 14, which is connected to the intake filter 5 of the combustion engine 3 through a pipe 16.

During normal operation, when there are no undesirable admixtures in the surrounding environment, such as water splashes, a large amount of flying dust or snow, which is detected by the relevant sensors of the operating conditions 9, such as a rain sensor, the slide 7 is set by the control member 8 at the command of the control unit 4 so that, that the main inlet 12 is connected by a pipe 15 to the separator 10 and intake of the intake air is carried out in a burst, for example, in front of the vehicle mask, while the protected inlet 13 is closed by the slide 7.

If the state of the surrounding environment changes, when, for example, the rain sensor 9 indicates an increased water content in the intake air, the control unit 4, possibly also the car operator, gives the command to move the slide valve 7 so that the main entrance 12 closes and the protected entrance 13 opens, connected with a protected space 11 so that dirt, for example water drops, does not enter the protected entrance 13.

As mentioned above, the control of the setting of the position of the slider 7 can alternatively be derived from other parameters, for example from the temperature of the vehicle's surroundings and the temperature of the engine. This will allow, for example, a faster warm-up of engine 3 during a cold start with a favorable effect on fuel consumption and harmful emissions.

Another option is the long-term extraction of the intake air from the protected space 11, for example when driving in very low ambient temperatures, when a permanently higher temperature of the intake air and the complete prevention of snow particles entering the intake filter 6 will prevent driving disturbances.

Another possibility is the proportional control of the position of the slide 7, for example in low loads of the motor 3 so that by partially turning the slide 7 the cross-section between the main inlet 12 and the separator 10 is reduced, for example to reduce the overall noise of the motor 3.

List of relationship tags

1. drive unit with adjustable suction

2. engine compartment

3. internal combustion engine

4. control unit

5. suction filter

6. two-way divider

7. slide valve

8. control member

9. sensor of operating conditions

10. separator

11. protected area

12. main entrance

13. protected entry

14th output

15. pipe

16. piping

Claims (10)

Patent claims 1. Drive unit with adjustable intake (1) arranged in the engine compartment (2) having a protected space (11), consisting of an internal combustion engine (3) with a control unit (4), which is equipped with an intake filter (5) and a separator ( 10) characterized by the fact that a two-way divider (6) with a slide (7) is connected to the suction filter (5), which is connected to the control member (8). 2. Drive unit with adjustable intake (1) according to claim 1, characterized in that the two-way divider (6) has a main inlet (12) which is connected to a separator (10), a protected inlet (13) connected to a protected space (11) ) and the outlet (14), which is connected to the intake filter (5) of the combustion engine (3), when under normal operating conditions the slide valve (7) is in a position in which the main inlet (12) is connected to the outlet (14) and in adverse operating conditions, the slide valve (7) is in a position in which the protected inlet (12) is connected to the outlet (14). 3. Drive unit with adjustable suction (1) according to claim 1, characterized in that the control member (8) is connected to the control unit (4), to which at least one sensor of operating conditions (9) is connected. 4. Drive unit with adjustable intake (1) according to claim 3, characterized in that the operating conditions sensor (9) is a rain sensor (9'). 5. Drive unit with adjustable suction (1) according to claim 3, characterized in that the sensor of operating conditions (9) is also a wiper switch (9)· 6. Drive unit with adjustable suction according to (1) of claim 3, characterized in that the operating conditions sensor (9) is an external temperature sensor (9'). 7. Drive unit with adjustable intake (1) according to claim 3, characterized in that the operating conditions sensor (9) is an engine temperature sensor (9''' 8. Drive unit with adjustable intake (1) according to claim 1 and 3, characterized in that the control member (8) is an electric servomotor. 9. Drive unit with adjustable suction (1) according to claim 1 and 3, characterized in that the control member (8) is a pneumatic servomotor. 10. Drive unit with adjustable suction (1) according to claim 1 and 3, characterized in that the control member (8) is a hydraulic servo motor.